Spectroscopic binaries - 13th complementary catalogue.

This catalogue is a continuation of the "catalogues des binaires spectroscopiques de l'Observatoire de Toulouse" which were first published in 1952. In the table we include orbital elements of recently investigated binaries which we have compiled from publications received at our Observatory between 1972 and 1974. To make our bibliographical research easier we hope to receive reprints of this type of work directly from authors. In the notes we indicate for each binary whether it is a new one or one already known. The particularities of each binary and the most important remarks made by the authors are mentioned. In the last complementary catalogue we referred to the problem of the magnitude homogenization; in this one we discuss the different definitions of the element T that are frequently encountered in the literature as used by various authors. Key words: stars - spectroscopic binaries